<!doctype html>
<html>
<head>
	<meta charset="utf-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
    <title>水印</title>
</head>
<body>
</body>
<script type="text/javascript" src="royui.min.js"></script>
<script>
	let $r = new royui();
    let $date = new Date()
	$r.watermark({
		watermark_angle: 15,
		watermark_txt: '贺强\n' + $date.toLocaleString()
	})
</script>
</html>